add azure storage to Kentico 11

I have blob container and I am trying to configuring Azure storage in Kentico 11. For basic execution of initialization code, I only need to register a "code-only" module through the API. So basically I added CMSAzureAccountName and CMSAzureSharedKey to web.config and created App_Code/CustomInit.cs like this:

// Registers the custom module into the system
[assembly: RegisterModule(typeof(CustomInitializationModule))]

    public class CustomInitializationModule : Module
    {
        // Module class constructor, the system registers the module under the name "CustomInit"
        public CustomInitializationModule()
            : base("CustomInit")
        {
        }

        // Contains initialization code that is executed when the application starts
        protected override void OnInit()
        {
            base.OnInit();

                EventLogProvider.LogInformation("AzureStorage", "ModuleInstalled");

                // Creates a new StorageProvider instance for Azure
                var mediaProvider = StorageProvider.CreateAzureStorageProvider();

                // Specifies the target container
                mediaProvider.CustomRootPath = "mytestcontainer";

                // Makes the container publicly accessible
                mediaProvider.PublicExternalFolderObject = true;

                // Maps a directory to the provider
                StorageHelper.MapStoragePath("~/corporatesite/media/", mediaProvider);
            }
        }

For some reason I don't see "ModuleInstalled" in the event log. Am I missing somehtings for a "code-only" module registration.